I'm working on a project where people's faces seen by a HoloLens camera will be captured and sent to Azure Cognitive Services API to display a halo of information around the person. Let me know if you are interested in collaborating on this!
There is sample code available which already does most of this, just not displayed in a halo, which will require a day or so to perfect with Unity, or a few minutes if not using Unity.
This is something I'm very interested. Any pointers to where I can get the sample code?
There are various samples available, here's one that isn't yet on hololens but is uwp.